Supercell over Laramie
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Wyoming Snow Precipitation Update

United States Natural Resources Water and Climate Center Department of Conservation Portland, Oregon Agriculture Service S N O W - P R E C I P I T A T I O N U P D A T E Based on Mountain Data from NRCS SNOTEL Sites As of SATURDAY: MAY 15 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 1.2 7.0 17 16.0 25.5 63 COTTONWOOD CREEK 7670 15.4 14.4 107 27.7 33.7 82 GRAND TARGHEE 9260 46.0 -M * 35.1 -M * GRANITE CREEK 6770 1.3 8.2 16 15.0 23.5 64 GRASSY LAKE 7265 18.2 27.1 67 30.9 42.7 72 GROS VENTRE SUMMIT 8750 8.8 10.2 86 12.0 16.3 74 GUNSIGHT PASS 9820 11.8 -M * 15.0 -M * LEWIS LAKE DIVIDE 7850 18.2 29.5 62 26.1 43.3 60 PHILLIPS BENCH 8200 17.4 24.6 71 24.9 34.7 72 SALT RIVER SUMMIT 7760 6.3 5.3 119 15.8 22.7 70 SNAKE RIVER STATION 6920 .0 6.2 0 19.3 26.8 72 SPRING CREEK DIVIDE 9000 23.1 25.1 92 23.6 31.5 75 THUMB DIVIDE 7980 5.3 10.1 52 16.6 23.3 71 TOGWOTEE PASS 9580 23.7 27.5 86 -M 30.7 * TWO OCEAN PLATEAU 9240 26.4 30.8 86 22.2 34.0 65 WILLOW CREEK 8380 22.3 25.8 86 34.9 40.0 87 ----- ----- Basin wide percent of average 75 72 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 17.7 25.6 69 17.8 25.1 71 BLACK BEAR 8170 27.6 37.0 75 31.7 47.9 66 CANYON 7870 7.0 7.4 95 14.1 18.9 75 FISHER CREEK 9100 26.6 36.8 72 29.6 44.0 67 MADISON PLATEAU 7750 16.2 20.1 81 25.1 32.0 78 NORTHEAST ENTRANCE 7350 .0 3.8 0 11.5 15.9 72 PARKER PEAK 9400 22.2 24.1 92 16.7 21.1 79 SYLVAN LAKE 8420 13.8 20.8 66 22.1 26.5 83 THUMB DIVIDE 7980 5.3 10.1 52 16.6 23.3 71 TWO OCEAN PLATEAU 9240 26.4 30.8 86 22.2 34.0 65 WHISKEY CREEK 6800 8.4 10.3 82 16.3 25.5 64 WHITE MILL 8700 19.1 24.9 77 20.4 33.0 62 WOLVERINE 7650 .1 3.5 3 9.5 16.6 57 ----- ----- Basin wide percent of average 75 70 WIND RIVER BURROUGHS CREEK 8750 11.4 10.6 108 -M 20.8 * COLD SPRINGS 9630 9.2 3.5 263 17.7 15.4 115 DEER PARK 9700 22.5 17.3 130 27.4 28.7 95 HOBBS PARK 10100 25.7 16.9 152 26.4 18.8 140 LITTLE WARM 9370 10.6 8.0 133 14.4 18.3 79 SOUTH PASS 9040 19.4 14.4 135 25.5 24.4 105 ST. LAWRENCE ALT 8620 9.8 4.0 245 19.1 13.6 140 TOGWOTEE PASS 9580 23.7 27.5 86 -M 30.7 * TOWNSEND CREEK 8700 16.2 5.9 275 24.0 17.1 140 ----- ----- Basin wide percent of average 137 113 BIGHORN BASIN BALD MTN. 9380 18.8 23.2 81 15.9 23.3 68 BEAR TRAP MEADOW 8200 5.1 .9 567 12.4 12.4 100 BLACKWATER 9780 22.7 28.9 79 21.6 26.5 82 BONE SPRINGS DIV 9350 15.3 16.5 93 15.3 20.1 76 EVENING STAR 9200 21.5 32.6 66 26.2 31.8 82 GRAVE SPRINGS 8550 12.0 8.4 143 16.7 14.6 114 KIRWIN 9550 13.3 11.3 118 15.6 15.7 99 MARQUETTE 8760 14.0 9.1 154 16.9 15.6 108 MIDDLE POWDER 7760 13.8 11.5 120 13.1 17.4 75 OWL CREEK 8975 3.4 2.5 136 11.2 9.4 119 POWDER RIVER PASS 9480 8.9 8.4 106 15.2 17.5 87 SHELL CREEK 9580 16.3 16.5 99 16.1 18.5 87 SYLVAN LAKE 8420 13.8 20.8 66 22.1 26.5 83 SYLVAN ROAD 7120 .0 3.1 0 15.8 21.8 72 TIMBER CREEK 7950 5.5 2.3 239 13.3 12.3 108 YOUNTS PEAK 8350 12.8 15.8 81 13.3 20.2 66 ----- ----- Basin wide percent of average 93 86 SHOSHONE RIVER BLACKWATER 9780 22.7 28.9 79 21.6 26.5 82 EVENING STAR 9200 21.5 32.6 66 26.2 31.8 82 KIRWIN 9550 13.3 11.3 118 15.6 15.7 99 MARQUETTE 8760 14.0 9.1 154 16.9 15.6 108 SYLVAN LAKE 8420 13.8 20.8 66 22.1 26.5 83 SYLVAN ROAD 7120 .0 3.1 0 15.8 21.8 72 YOUNTS PEAK 8350 12.8 15.8 81 13.3 20.2 66 ----- ----- Basin wide percent of average 81 83 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.1 .9 567 12.4 12.4 100 BIG GOOSE 7990 13.3 9.3 143 18.0 14.7 122 BONE SPRINGS DIV 9350 15.3 16.5 93 15.3 20.1 76 BURGESS JUNCTION 7880 14.6 10.5 139 16.5 16.9 98 CLOUD PEAK RESERVOIR 9860 19.4 15.0 129 19.5 19.2 102 DOME LAKE 8880 13.9 10.7 130 19.1 18.6 103 GRAVE SPRINGS 8550 12.0 8.4 143 16.7 14.6 114 HANSEN SAWMILL 8360 5.9 2.4 246 14.0 12.3 114 MIDDLE POWDER 7760 13.8 11.5 120 13.1 17.4 75 POWDER RIVER PASS 9480 8.9 8.4 106 15.2 17.5 87 SUCKER CREEK 8880 17.9 10.5 170 21.5 19.4 111 TIE CREEK 6870 -M 1.5 * 18.5 15.3 121 ----- ----- Basin wide percent of average 135 101 BELLE FOURCHE BLIND PARK 6890 2.5 .2 1250* 17.8 15.8 113 COLE CANYON 5910 4.0 .9 444 16.9 11.1 152 NORTH RAPID CREEK 6130 .7 .7 100* 16.8 12.6 133 ----- ----- Basin wide percent of average 400* 130 UPPER N. PLATTE RIVER COLUMBINE 9160 18.1 13.8 131 29.2 30.6 95 DIVIDE PEAK 8880 20.5 13.3 154 29.6 25.8 115 ELK RIVER 8700 14.0 8.1 173 25.7 24.4 105 JOE WRIGHT 10120 25.2 24.0 105 29.9 32.3 93 NORTH FRENCH CREEK 10130 43.2 33.4 129 43.3 31.9 136 OLD BATTLE 10000 42.6 35.8 119 45.3 42.0 108 SAGE CREEK BASIN 7850 3.1 7.7 40 16.1 15.0 107 SOUTH BRUSH CREEK 8440 11.6 6.9 168 25.0 21.8 115 TOWER 10500 42.9 51.7 83 42.5 47.6 89 WEBBER SPRINGS 9250 24.2 18.8 129 35.3 32.9 107 WILLOW CREEK PASS 9540 13.8 11.6 119 17.3 17.0 102 ----- ----- Basin wide percent of average 115 106 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.9 23.7 109 29.5 29.0 102 CASPER MTN. 7900 16.8 12.2 138 20.1 21.6 93 DEADMAN HILL 10220 -M 18.3 * -M 22.7 * DEER PARK 9700 22.5 17.3 130 27.4 28.7 95 LAPRELE CREEK 8375 6.4 3.8 168 18.2 18.1 101 RENO HILL 8400 17.4 10.1 172 24.8 22.4 111 ROACH 9700 22.5 13.9 162 28.6 24.3 118 SAND LAKE 10050 39.9 35.8 111 39.7 31.7 125 SOUTH PASS 9040 19.4 14.4 135 25.5 24.4 105 WINDY PEAK 7900 7.4 1.9 389 17.4 15.1 115 ----- ----- Basin wide percent of average 134 107 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .9 0* 19.0 19.7 96 DIVIDE PEAK 8880 20.5 13.3 154 29.6 25.8 115 OLD BATTLE 10000 42.6 35.8 119 45.3 42.0 108 SANDSTONE RS 8150 5.2 4.1 127 22.0 23.3 94 WHISKEY PARK 8950 28.2 27.0 104 39.0 35.9 109 ----- ----- Basin wide percent of average 119 106 UPPER GREEN RIVER BIG SANDY OPENING 9080 6.9 9.4 73 12.5 17.1 73 BLIND BULL SUM 8650 20.7 25.2 82 16.8 26.5 63 EAST RIM DIVIDE 7930 .2 9.6 2 9.2 14.8 62 ELKHART PARK G.S. 9400 8.1 9.7 84 11.6 17.3 67 GROS VENTRE SUMMIT 8750 8.8 10.2 86 12.0 16.3 74 GUNSIGHT PASS 9820 11.8 -M * 15.0 -M * KENDALL R.S. 7740 .1 4.2 2 10.9 17.4 63 LOOMIS PARK 8240 3.8 10.1 38 13.2 21.1 63 NEW FORK LAKE 8340 .5 4.2 12 8.7 14.5 60 POCKET CREEK 9360 8.8 -M * 14.4 -M * SNIDER BASIN 8060 7.8 8.1 96 15.8 19.4 81 SPRING CREEK DIVIDE 9000 23.1 25.1 92 23.6 31.5 75 TRIPLE PEAK 8500 18.0 17.7 102 27.2 30.2 90 ----- ----- Basin wide percent of average 73 71 LOWER GREEN RIVER HAMS FORK 7840 .6 1.5 40 13.8 15.8 87 HEWINTA 9519 9.1 4.8 190 17.7 19.0 93 HICKERSON PARK 9145 2.7 2.3 117 15.3 11.3 135 HOLE-IN-ROCK 9150 2.3 1.9 121 15.0 10.8 139 INDIAN CREEK 9425 21.7 24.2 90 22.3 30.9 72 KELLEY R.S. 8180 9.0 9.5 95 17.5 24.8 71 STEEL CREEK PARK 10200 21.1 18.3 115 22.0 21.5 102 ----- ----- Basin wide percent of average 106 92 UPPER BEAR RIVER BUG LAKE 7950 11.7 11.4 103 19.2 23.7 81 HAYDEN FORK 9212 7.4 7.8 95 24.0 26.7 90 KELLEY R.S. 8180 9.0 9.5 95 17.5 24.8 71 LILY LAKE 9156 11.7 6.7 175 20.1 22.5 89 MONTE CRISTO 8960 18.3 23.2 79 24.6 32.1 77 SALT RIVER SUMMIT 7760 6.3 5.3 119 15.8 22.7 70 TRIAL LAKE 9992 20.7 23.6 88 21.4 31.2 69 ----- ----- Basin wide percent of average 97 78 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Average Snow Water Equivalent and Total Precipitation values If the Basin wide percent of average value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Average represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the average value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the average value for those sites on this day. Contact your state water supply staff for assistance. Reference period for average conditions is 1971-2000. Provisional data, subject to revision. ---------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100.